74450942449 has 27 divisors (see below), whose sum is σ = 81743964939. Its totient is φ = 67777678800.

The previous prime is 74450942441. The next prime is 74450942459. The reversal of 74450942449 is 94424905447.

It is a happy number.

The square root of 74450942449 is 272857.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 11013453025 + 63437489424 = 104945^2 + 251868^2 .

It is not a de Polignac number, because 74450942449 - 2³ = 74450942441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74450942396 and 74450942405.

It is not an unprimeable number, because it can be changed into a prime (74450942441) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 493052524 + ... + 493052674.

It is an arithmetic number, because the mean of its divisors is an integer number (3027554257).

Almost surely, 2^74450942449 is an apocalyptic number.

74450942449 is the 272857-th square number.

74450942449 is the 136429-th centered octagonal number.

It is an amenable number.

74450942449 is a deficient number, since it is larger than the sum of its proper divisors (7293022490).

74450942449 is an equidigital number, since it uses as much as digits as its factorization.

74450942449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 52.

The spelling of 74450942449 in words is "seventy-four billion, four hundred fifty million, nine hundred forty-two thousand, four hundred forty-nine".